> install.packages("AER")
Installing package into ‘C:/Users/Mark/Documents/R/win-library/3.0’
(as ‘lib’ is unspecified)
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.0/AER_1.2-2.zip'
Content type 'application/zip' length 2360547 bytes (2.3 Mb)
opened URL
downloaded 984 Kb

Warning in install.packages :
  downloaded length 1007616 != reported length 2360547
Warning in install.packages :
  error 1 in extracting from zip file
Warning in install.packages :
  cannot open compressed file 'AER/DESCRIPTION', probable reason 'No such file or directory'
Error in install.packages : cannot open the connection
> 
> install.packages("AER")
Installing package into ‘C:/Users/Mark/Documents/R/win-library/3.0’
(as ‘lib’ is unspecified)
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.0/AER_1.2-2.zip'
Content type 'application/zip' length 2360547 bytes (2.3 Mb)
opened URL
downloaded 520 Kb

Warning in install.packages :
  downloaded length 532480 != reported length 2360547
Warning in install.packages :
  error 1 in extracting from zip file
Warning in install.packages :
  cannot open compressed file 'AER/DESCRIPTION', probable reason 'No such file or directory'
Error in install.packages : cannot open the connection
> install.packages("AER")
Installing package into ‘C:/Users/Mark/Documents/R/win-library/3.0’
(as ‘lib’ is unspecified)
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.0/AER_1.2-2.zip'
Content type 'application/zip' length 2360547 bytes (2.3 Mb)
opened URL
downloaded 1.9 Mb

Warning in install.packages :
  downloaded length 1990656 != reported length 2360547
Warning in install.packages :
  error 1 in extracting from zip file
Warning in install.packages :
  cannot open compressed file 'AER/DESCRIPTION', probable reason 'No such file or directory'
Error in install.packages : cannot open the connection
> install.packages("AER")
Installing package into ‘C:/Users/Mark/Documents/R/win-library/3.0’
(as ‘lib’ is unspecified)
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.0/AER_1.2-2.zip'
Content type 'application/zip' length 2360547 bytes (2.3 Mb)
opened URL
downloaded 2.3 Mb

package ‘AER’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
	C:\Users\Mark\AppData\Local\Temp\RtmpEvm9fG\downloaded_packages